Recoilless Gas Block System

Abstract

An improved gas block and gas piston system for AR rifle and AR rifle variants having a gas entry port communicable with a gas port from the barrel of an AR rifle, a chamber configured to accommodate a piston that is driven rearward when gases from a fired round enter the chamber; and at least one port wherein a portion of the spent gases from a fired round exit from the chamber configured to accommodate a piston. The port wherein a portion of the spent gases from a fired round exit from the chamber can be configured such that gases escape forward, upward, laterally, or at other angles. The improved gas block assembly will significantly reduce or eliminate recoil and mitigate muzzle rise. Such a gas block can be configured with a gas piston assembly or as part of an autoloading rifle.

What is claimed is: 
     
         1 . A recoilless gas block configurable to AR rifle platforms comprising:
 a. a gas entry port communicable with a gas port from the barrel of an AR rifle wherein gases from a fired round enter;   b. a chamber configured to accommodate a piston that is driven rearward when the said gases from a fired round enter the said chamber; and   c. at least one port wherein a portion of the spent gases from a fired round exit from the chamber.   
     
     
         2 . The recoilless gas block of  claim 1  wherein the at least one port wherein a portion of the spent gases from a fired round exit from the chamber is a forward port angled at ninety degrees from the gas entry port. 
     
     
         3 . The recoilless gas block of  claim 1  wherein the at least one port wherein a portion of the spent gases from a fired round exit from the chamber is an upper port located in the upper end of the gas block. 
     
     
         4 . The recoilless gas block of  claim 3  wherein the upper port is opened when a piston, when moving rearward, clears the said upper port in the gas block. 
     
     
         5 . The recoilless gas block of  claim 3  wherein the upper port located in the upper end of the gas block is a slot. 
     
     
         6 . The recoilless gas block of  claim 3  wherein the upper port located in the upper end of the gas block is a plurality of ports. 
     
     
         7 . A recoilless gas block system configurable to AR rifle platforms comprising:
 a. a gas block communicable with a gas port from the barrel of an AR rifle or AR rifle variant;   b. a gas entry port;   c. a piston;   d. a piston rod;   e. a piston spring;   f. an anvil mounted on the upper surface of a bolt carrier group; and   g. at least one port wherein a portion of the spent gases from a fired round exit from the said gas block.   
     
     
         8 . The recoilless gas block system of  claim 7  wherein the at least one port wherein a portion of the spent gases from a fired round exit from the chamber is a forward port angled at ninety degrees from the gas entry port. 
     
     
         9 . The recoilless gas block system of  claim 7  wherein the at least one port wherein a portion of the spent gases from a fired round exit from the chamber is an upper port located in the upper end of the gas block. 
     
     
         10 . The recoilless gas block system of  claim 9  wherein the upper port is opened when a piston, when moving rearward, clears the said upper port in the gas block. 
     
     
         11 . The recoilless gas block system of  claim 9  wherein the upper port located in the upper end of the gas block is a slot. 
     
     
         12 . The recoilless gas block system of  claim 9  wherein the upper port located in the upper end of the gas block is a plurality of ports. 
     
     
         13 . The recoilless gas block system of  claim 7  wherein the at least one port wherein a portion of the spent gases from a fired round exit from the chamber through a plurality of side ports located on the sides of the gas block. 
     
     
         14 . The recoilless gas block system of  claim 13  wherein the plurality of side ports are opened when a piston, when moving rearward, clears the said upper port in the gas block. 
     
     
         15 . A recoilless autoloading firearm system comprising:
 a. a barrel having a gas port formed through the wall of the said barrel;   b. a recoilless gas block assembly including a gas entry port communicable with a gas port from the barrel of an AR rifle wherein gases from a fired round enter a chamber configured to accommodate a piston that is driven rearward when the said gases from a fired round enter the said chamber, and at least one port wherein a portion of the spent gases from a fired round exit from the chamber;   c. a gas piston assembly;   d. an upper receiver assembly;   e. a lower receiver assembly;   f. a magazine; and   g. a bolt carrier assembly.   
     
     
         16 . The recoilless autoloading firearm system of  claim 15  wherein the at least one port wherein a portion of the spent gases from a fired round exit from the chamber is a forward port angled at ninety degrees from the gas entry port. 
     
     
         17 . The recoilless autoloading firearm system of  claim 15  wherein the at least one port wherein a portion of the spent gases from a fired round exit from the chamber is an upper port located in the upper end of the gas block. 
     
     
         18 . The recoilless autoloading firearm system of  claim 15  wherein the upper port located in the upper end of the gas block is a slot. 
     
     
         19 . The recoilless autoloading firearm system of  claim 15  wherein the upper port located in the upper end of the gas block is a plurality of ports. 
     
     
         20 . The recoilless autoloading firearm system of  claim 15  wherein the at least one port wherein a portion of the spent gases from a fired round exit from the chamber through a plurality of side ports located on the sides of the gas block.